NAME

mesg − permit or deny messages

SYNOPSIS

mesg [ n ] [ y ]

DESCRIPTION

Mesg with argument n forbids messages via write(1) by revoking non-user write permission on the user’s terminal. Mesg with argument y reinstates permission.  All by itself, mesg reports the current state without changing it. 

EXAMPLE

mesg y

changes the permission to "yes", and the system reports:

Is Yes; Was No

or whatever is the current and former state of your message permission. 

FILES

/dev/tty∗

SEE ALSO

write(1). 

DIAGNOSTICS

Exit status is 0 if messages are receivable, 1 if not, 2 on error. 

Version 2.5r1  —  October 29, 1986